diff --git a/functions/execute_shell_command.json b/functions/execute_shell_command.json
new file mode 100644
index 0000000..e0f1639
--- /dev/null
+++ b/functions/execute_shell_command.json
@@ -0,0 +1,18 @@
+{
+  "name": "execute_shell_command",
+  "description": "Spustí shellový příkaz a vrátí jeho výstup.",
+  "strict": true,
+  "parameters": {
+    "type": "object",
+    "properties": {
+      "command": {
+        "type": "string",
+        "description": "Shellový příkaz k vykonání."
+      }
+    },
+    "additionalProperties": false,
+    "required": [
+      "command"
+    ]
+  }
+}
\ No newline at end of file